Breathable 3D Supercapacitors Based on Activated Carbon Fiber Veil

Shin, Dongwoo; Shen, Caiwei; Sanghadasa, Mohan; Liu, Lin

doi:10.1002/admt.201800209

Cited by 22 publications

(22 citation statements)

References 34 publications

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“…2D material‐based electrodes are promising for flexible and wearable applications because of the flexible nature of 2D sheets. Strong and free‐standing electrodes can reduce the weight and volume of structural package materials and improve the overall performance for practical devices . In this work, the mechanical toughness of electrodes is strengthened by adding carbon fibers, which are strong for applications in reinforcement of composite materials .…”

Section: Resultsmentioning

confidence: 99%

“…Strong and free-standing electrodes can reduce the weight and volume of structural package materials and improve the overall performance for practical devices. [51][52][53] In this work, the mechanical toughness of electrodes is strengthened by adding carbon fibers, which are strong for applications in reinforcement of composite materials. [51] In addition, all-solidstated supercapacitors can be constructed using polymer electrolyte for flexible energy storage systems.…”

Section: Mechanical Properties Of Materials and Flexible Solid-state mentioning

confidence: 99%

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Mass Loading‐Independent Energy Storage with Reduced Graphene Oxide and Carbon Fiber

et al. 2019

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Large‐scale manufacturing of thick electrode films with high energy storage is critical for practical applications. Two‐dimensional materials are promising candidates due to their high surface areas to volume ratios. However, various studies have reported that the storage capacity of these two‐dimensional materials is highly dependent on the thickness of the films. Here, we demonstrate a scheme based on the reduced graphene oxide/carbon fiber composites as supercapacitor electrodes which demonstrate a mass loadings‐independent energy and power performances. Randomly oriented and interconnected carbon fibers are utilized to provide a framework to alleviate the restacking issues of reduced graphene oxide nanosheets and promoting ion flows in the networks. High capacitances maintain even the mass loadings up to 4 mg cm−2. An all‐solid symmetrical supercapacitor has been fabricated to power a LED light and also can power a commercial gas sensor, which shows the practical application potential.

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Section: Resultsmentioning

confidence: 99%

Section: Mechanical Properties Of Materials and Flexible Solid-state mentioning

confidence: 99%

Mass Loading‐Independent Energy Storage with Reduced Graphene Oxide and Carbon Fiber

et al. 2019

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“…[186] The capacitance remained at 16.8 mF cm −2 while the supercapacitors were stretched up to 360%, and 85% of capacitance was sustained after 2000 stretching/releasing cycles under 200% strains. In another study, a lightweight, stretchable, and tailorable supercapacitor based on activated carbon fiber veil was incorporated in shoes, [189] as shown in Figure 8f. [187] For the integration on other wearables, a stretchable microsupercapacitor mounted on wrist strap has also been reported, [188] as shown in Figure 8e.…”

Section: Nontouching Wearablesmentioning

confidence: 99%

Section: Skin-touching Wearablesmentioning

confidence: 99%

Stretchable Supercapacitors as Emergent Energy Storage Units for Health Monitoring Bioelectronics

Chen

Villa

Zhuang

et al. 2019

Advanced Energy Materials

104

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Emerging health monitoring bioelectronics require energy storage units with improved stretchability, biocompatibility, and self‐charging capability. Stretchable supercapacitors hold great potential for such systems due to their superior specific capacitances, power densities, and tissue‐conforming properties, as compared to both batteries and conventional capacitors. Despite the rapid progress that has been made in supercapacitor research, practical applications in health monitoring bioelectronics have yet to be achieved, requiring innovations in materials, device configurations, and fabrications tailored for such applications. In this review, the progress in stretchable supercapacitor‐powered health monitoring bioelectronics is summarized and the required specifications of supercapacitors for different types of application settings with varying demands on biocompatibility are discussed, including nontouching wearables, skin‐touching wearables, skin‐conforming wearables, and implantables. The perspective of this review is then broadened to focus on integration of stretchable supercapacitors in bioelectronics and aspects of energy harvesting and sensing. Finally further insights on the existing challenges in this developing field and potential solutions are provided.

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“…Energy storage devices have become increasingly important because of the demands in rapidly advancing technologies such as portable/wearable electronics, electrical vehicles, drones, internet of things, point‐of‐care medical systems, renewable energy systems, and so on ,. While lithium‐ion batteries (LIBs) are the power solution for most of the current consumer electronics and electric vehicles because of its relatively high energy density and power density, further developments are desirable to enhance the safety, durability and lower the manufacturing cost of the current and future power systems …”

Section: Introductionmentioning

confidence: 99%

High‐Voltage Supercapacitors Based on Aqueous Electrolytes

et al. 2018

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Supercapacitors with high power density and life cycles are an important family of power supplies among energy storage systems. The operating voltage window of a supercapacitor is determined by both the chemistry of electrode materials and the electrochemical kinetics of electrolytes while the water hydrolysis potential of 1.23 V is the typical limit for capacitors based on aqueous electrolytes. Here, we briefly outline the working mechanism of electrochemical supercapacitors, including electron double layer capacitors (EDLC) and pseudo-capacitors, and investigate the limitations of their working voltages. The principles and examples of different designs of electrodes and electrolytes for high-voltage supercapacitors beyond the hydrolysis limit are discussed, such as asymmetric electrodes, high concentration electrolytes, and electrolytes with different pH values. Insights into high voltage capacitor cells and future prospects are provided for the development of electrochemical energy storage systems.[a] Dr.

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Breathable 3D Supercapacitors Based on Activated Carbon Fiber Veil

Abstract: package generates dead mass and volume which reduces the overall energy and power density of the system. [18] Here, we report a facile and scalable method of fabricating a substrate-free, freestanding, lightweight, breathable, foldable, tailorable, and flexible veil-based electrode

Cited by 22 publications

References 34 publications

Mass Loading‐Independent Energy Storage with Reduced Graphene Oxide and Carbon Fiber

Mass Loading‐Independent Energy Storage with Reduced Graphene Oxide and Carbon Fiber

Stretchable Supercapacitors as Emergent Energy Storage Units for Health Monitoring Bioelectronics

High‐Voltage Supercapacitors Based on Aqueous Electrolytes

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